Results 21 to 30 of about 17,442 (251)

Competition and resource breadth shape niche variation and overlap in multiple trophic dimensions [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2019
Competition plays a central role in the maintenance of biodiversity. A backbone of classic niche theory is that local coexistence of competitors is favoured by the contraction or divergence of species' niches. However, this effect should depend on the diversity of resources available in the local environment, particularly when resources vary in ...
Raul Costa-Pereira, Márcio S. Araújo, Franco L. Souza, Travis Ingram   +3 more
openaire   +4 more sources

High trophic overlap within the seabird community of Argentinean Patagonia: a multiscale approach [PDF]

Journal of Animal Ecology, 2004
Summary Food web interactions in animal communities can be investigated through the measurement of stable isotopes (e.g. δ15N, δ13C). We used this approach in a community of 14 species of seabirds breeding on the Argentinean Patagonian coast. Tissue samples were collected from nestling and adult seabirds, as well as prey, during three consecutive ...
Forero, Manuela G., Bortolotti, Gary R., Hobson, Keith A., Donazar, Jose A., Bertellotti, Néstor Marcelo, Blanco, Guillermo   +5 more
openaire   +3 more sources

Trophic ecology and niche overlap of two sympatric species of Rhamdia (Siluriformes, Heptapteridae) from northeast Oaxaca, Mexico [PDF]

Neotropical Biology and Conservation
The trophic ecology of fishes in the genus Rhamdia remains poorly reported. Here, we aim to describe the diet composition and infer the trophic levels, niche breadth, and niche overlap between Rhamdia guatemalensis and Rhamdia laticauda in northeast ...
César Camilo Julián-Caballero, Emilio Martínez-Ramírez, Rosa María Gómez-Ugalde, Eufemia Cruz-Arenas   +3 more
doaj   +3 more sources

Community-level trophic characteristics and interactions between native and non-native fish: The example of the Lower Pearl River Basin of China [PDF]

NeoBiota
Aquatic ecosystems can harbour more than one non-native fish species and this can represent a threat due to trophic interactions with native fishes. However, research on interactions amongst multiple co-occurring native and non-native fish remains scarce.
Hui Wei, Lorenzo Vilizzi, Mingsi Zhang, Ying Jiang, Meng Xu, Miao Fang, Fandong Yu, Lu Shu, Xuejie Wang, Dangen Gu   +9 more
doaj   +3 more sources

Resource Partitioning among “Ancillary” Pelagic Fishes (Scomber spp., Trachurus spp.) in the Adriatic Sea

Biology, 2023
The Mediterranean is one of the most overfished seas of the world where mesopredators are severely threatened. The trophic strategies of four pelagic species that inhabit the Adriatic Sea (Scomber spp.
Zaira Da Ros, Emanuela Fanelli, Sacha Cassatella, Ilaria Biagiotti, Giovanni Canduci, Samuele Menicucci, Andrea De Felice, Sara Malavolti, Iole Leonori   +8 more
doaj   +1 more source

Trophic Links Between Birds of Prey and Their Preys and Their Competitors in Wetlands During Nesting Period

Пернатые хищники и их охрана, 2019
The article is dedicated to the analysis of trophic relations of large birds of prey and adaptive mechanisms they use to reduce interspecific trophic competition during the breeding period in wetlands in Northern Belarus. The study shows that during this
Vladimir V. Ivanovsky
doaj   +1 more source

Trophic Niche Overlap between Invasive and Indigenous Fish in a Northwest Reservoir of China [PDF]

Water, 2021
The Kizil reservoir in the Tarim River basin is an important habitat for the native Schizothoracinae fish (including Aspiorhynchus laticeps, Schizothorax biddulphi, Schizothorax eurystomus, Schizothorax intermedius and Schizothorax barbatus). Unfortunately, these species are threatened by many exotic fish, such as Ctenopharyngodon idellus, Silurus ...
Jie Wei, Zhulan Nie, Fenfen Ji, Longhui Qiu, Jianzhong Shen   +4 more
openaire   +1 more source

Stable Isotope Analysis of Juvenile White Sharks Inside a Nursery Area Reveals Foraging in Demersal-Inshore Habitats and Trophic Overlap With Sympatric Sharks

Frontiers in Marine Science, 2021
Knowledge about top predators’ trophic ecology is crucial for defining their role in ecosystems, understanding habitat preferences, characterizing life stage-specific feeding habits, and evaluating their interaction with fisheries.
Emiliano García-Rodríguez, Sharon Z. Herzka, Oscar Sosa-Nishizaki, Christopher G. Lowe, John B. O’Sullivan   +4 more
doaj   +1 more source

Lizard assemblage from a sand dune habitat from southeastern Brazil: a niche overlap analysis

Anais da Academia Brasileira de Ciências, 2016
Communities are structured by interactions of historical and ecological factors, which influence the use of different resources in time and space. We acquired data on time of activity, microhabitat use and diet of a lizard assemblage from a sand dune ...
GISELE R. WINCK, FABIO HATANO, DAVOR VRCIBRADIC, MONIQUE VAN SLUYS, CARLOS F.D. ROCHA   +4 more
doaj   +1 more source

Plasticity and overlap of trophic niches in tropical breeding Laridae

Marine Ecology Progress Series
Trophic ecology of seabirds in tropical regions remains poorly understood despite the large number of multispecies breeding colonies supported by these ecosystems. Here, we used the isotopic niche (δ15N and δ13C) of 5 Laridae species at 2 breeding areas in Cuba to analyze the plasticity and interspecific overlap of trophic niche determined from chick ...
Garcia-Quintas, Antonio, Bustamante, Paco, Barbraud, Christophe, Lorrain, Anne, Denis, Dennis, Lanco, Sophie   +5 more
openaire   +3 more sources